Electric oven with multiple temperature zones

Abstract

An electric oven with multiple temperature zones comprises a base, a heat insulation layer, a heating unit and a pot set. The base comprises a base body and a cooling fan. The base comprises a bottom shell and a bearing shell. The bottom shell is provided with an air inlet, and the heat insulation layer comprises a supporting plate and a heat insulation layer body. A heightening piece is arranged between the supporting plate and the bearing shell. The heating unit comprises a heat conduction disc and an electric heating tube. The heat conduction disc comprises a high-temperature area and a low-temperature area. The pot set comprises a high-temperature pot and a low-temperature pot. The cooling fan is arranged in the bottom shell, so that the surface of the base is kept at a low temperature, and scalding is avoided. The electric heating tubes are arranged in the heat conduction disc and distributed in the center of the heat conduction disc. The high-temperature area is arranged corresponding to the electric heating tube, the wall thickness of the low-temperature area is reduced, heat conduction is reduced, and therefore the effect that the periphery is relatively low in temperature is achieved, and the effect that different temperature areas can be achieved through a single heat source can be achieved.

Description

Technical Field

[0001] This invention relates to the field of electric oven technology, and in particular to an electric oven with multiple temperature zones. Background Technology

[0002] With the rapid development of society and the economy, people's living standards have continuously improved, and their dietary requirements have moved beyond simply satisfying basic needs. There are various cooking methods, among which roasted foods offer a unique flavor and are loved by many. Roasting methods include traditional charcoal grilling and environmentally friendly electric grilling, which requires an electric oven. Traditional electric ovens achieve dual-temperature zone functionality using two sets of heaters, achieving this through separate control of the two sets. This method is costly and structurally complex.

[0003] In the prior art, for example, application number CN201410839335.2 discloses a dual-temperature zone electric oven structure, which includes a main body with a baking tray on the main body. The baking tray has a heating zone and a heat preservation zone. A heat insulation box is installed at the bottom of the baking tray, and an electric heating wire is installed inside the heat insulation box. The electric heating wire includes a heating zone heating wire corresponding to the heating zone and a heat preservation zone heating wire corresponding to the heat preservation zone. One conductive end of the heat preservation zone heating wire and the heating zone heating wire are connected to each other to form an intermediate conductive end. The heat insulation box has a switch mounting base and the intermediate conductive end. The other conductive ends of the heat preservation zone heating wire and the heating zone heating wire are respectively installed on the switch mounting base. This type of electric oven structure can achieve heating of the entire area by switching the energized conductive ends. When heat preservation is required, only the heating zone needs to be heated, and the heat preservation zone achieves a short-term heat preservation function under the action of residual heat, thereby enhancing convenience.

[0004] While the above solution can achieve dual-temperature zone functionality, it requires separate heating elements for different temperature zones and independent control to achieve zoned insulation, resulting in higher production costs. Summary of the Invention

[0005] In view of this, the present invention provides an electric oven with multiple temperature zones to solve the above-mentioned technical problems.

[0006] An electric oven with multiple temperature zones includes a base, a heat insulation layer disposed in the base, a heating unit disposed in the heat insulation layer, and a pot assembly disposed on the heating unit. The base includes a base plate, a cooling fan disposed in the base, a bottom outer shell, and a supporting outer shell disposed on the bottom outer shell. The bottom outer shell has an air inlet at a position corresponding to the cooling fan. The heat insulation layer includes a support plate fixedly disposed on the supporting outer shell, and a heat insulation layer disposed on the side of the support plate facing away from the cooling fan. A temperature sensor is disposed in the heat insulation layer. The support plate and the supporting shell are fixedly connected by fasteners, and a shim is disposed between the support plate and the supporting shell. The heating unit includes an integrally formed heat-conducting plate and an electric heating tube disposed in the heating plate. The heat-conducting plate includes a high-temperature zone and a low-temperature zone disposed around the high-temperature zone. The pot assembly includes a high-temperature pot placed on the high-temperature zone and a low-temperature pot placed on the low-temperature zone. When the low-temperature pot is placed on the low-temperature zone, there is a gap between the edge of the low-temperature pot and the edge of the supporting shell.

[0007] Furthermore, the bottom outer shell and the supporting outer shell are integrally formed; the diameter of the bottom outer shell is larger than the diameter of the supporting outer shell.

[0008] Furthermore, an air exchange port is provided around the air inlet.

[0009] Furthermore, the shape of the heat insulation layer facing the end face of the heating unit is consistent with that of the heating unit.

[0010] Furthermore, one end face of the heating unit is attached to the heat insulation layer, and the other side is used to assemble the pot assembly.

[0011] Furthermore, the edge of the low-temperature zone is inclined toward the supporting outer shell.

[0012] Furthermore, the end faces of both the high-temperature zone and the low-temperature zone facing the pot assembly are flat.

[0013] Furthermore, the edge of the high-temperature pot is bent outward; the low-temperature pot is annular, and the outer edge of the low-temperature pot is bent and level with the bottom surface of the supporting shell.

[0014] Furthermore, the outer diameter of the high-temperature pot is larger than the inner diameter of the low-temperature pot.

[0015] Compared with existing technologies, the electric oven with multiple temperature zones provided by this invention utilizes a cooling fan installed in the bottom outer shell, a spaced-out arrangement between the support plate and the supporting outer shell, and a spaced-out arrangement between the edge of the low-temperature pot and the edge of the supporting outer shell. This allows air to be drawn into the bottom outer shell by the cooling fan and then flow out through the gaps, keeping the base surface at a low temperature to prevent burns. The heating element is installed in the heat-conducting plate, with the heating element positioned at the center of the plate. The heat-conducting plate includes a high-temperature zone and a low-temperature zone surrounding the high-temperature zone. The high-temperature zone corresponds to the heating element, and the low-temperature zone has a thinned wall to reduce heat conduction, thereby achieving a relatively low temperature effect at the periphery. This allows different temperature zones to be achieved using a single heat source. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an electric oven with multiple temperature zones provided by the present invention.

[0017] Figure 2 for Figure 1 A schematic diagram of the structure of an electric oven with multiple temperature zones from another perspective.

[0018] Figure 3 for Figure 1 A cross-sectional structural diagram of an electric oven with multiple temperature zones.

[0019] Figure 4 for Figure 1 A schematic diagram of the exploded structure of an electric oven with multiple temperature zones.

[0020] Figure 5 for Figure 3 A magnified view of a portion of the image. Detailed Implementation

[0021] The following provides a more detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0022] like Figures 1 to 5 The diagram shown is a structural schematic of an electric oven with multiple temperature zones provided by the present invention. The electric oven with multiple temperature zones includes a base assembly 10, a heat insulation assembly 20 disposed in the base assembly 10, a heating unit 30 disposed in the heat insulation assembly 20, and a pot assembly 40 disposed on the heating unit 30. It is conceivable that the electric oven with multiple temperature zones also includes other functional structures, such as fasteners, nuts, electrical connection components, etc., which are technologies known to those skilled in the art and will not be described in detail here.

[0023] The base assembly 10 includes a base 11 and a cooling fan 12 disposed within the base 11. The base 11 includes a bottom outer shell 111 and a support outer shell 112 disposed on the bottom outer shell 111. The bottom outer shell 111 has an air inlet 13 at the position corresponding to the cooling fan 12, and a ring of ventilation ports 14 surrounding the air inlet 13. The edges of the support outer shell 112 are bent inward to prevent scratches from the sharp edges.

[0024] The bottom outer shell 111 and the supporting outer shell 112 are integrally formed. The diameter of the bottom outer shell 111 is larger than the diameter of the supporting outer shell 112, so that the bottom outer shell 111 and the supporting outer shell 112 are stepped.

[0025] The cooling fan 12 is fixed to the bottom outer shell 111 by fasteners, and a gap is left between the fan and the end face of the bottom outer shell 111 to increase air intake efficiency. The cooling fan 12 draws in low-temperature air from the air inlet 13 and blows it toward the heat insulation component 20 to help cool the heat insulation layer 20. The ventilation port 14 can exchange the air between the base 11 and the outside, keeping the pressure between the base 11 and the outside environment balanced, enhancing air flow, thereby quickly dissipating the heat in the base 11 to the outside, keeping the temperature of the base 11 at a low temperature and avoiding burns. In this embodiment, the low temperature range of the base 11 is between 40°C and 50°C.

[0026] The heat insulation component 20 includes a support plate 21 fixedly mounted on the bearing housing 112, a heat insulation layer 22 mounted on the side of the support plate 21 facing away from the cooling fan 12, and a temperature sensor 23 mounted in the heat insulation layer 22.

[0027] The support plate 21 can be a metal plate, used to support the heat insulation layer 22, and also to prevent the heat insulation layer 22 from breaking down due to long-term heat exposure and causing debris to fall and contaminate the pot environment. The support plate 21 is fixedly connected to the supporting shell 112 by fasteners, and a shim 24 is provided between the support plate 21 and the supporting shell 112. The shim 24 is fitted onto the fasteners, creating a gap between the support plate 21 and the supporting shell 112, and also allowing the air blown by the cooling fan 12 to flow out through the gap between the support plate 21 and the supporting shell 112, thus improving airflow. The fasteners pass sequentially from the outside of the supporting shell 112 and the shim 24, and are finally fixed to the support plate 21, achieving the purpose of supporting and fixing the support plate 21.

[0028] The heat insulation layer 22 can be made of fiberglass, asbestos, rock wool, etc., and is sandwiched between the support plate 21 and the heating unit 30, with the end face of the heat insulation layer 22 facing the heating unit 30 in close contact with it. The temperature sensor 23 is placed in the heat insulation layer 212 and abuts against one end face of the heating unit 30. It is used to detect the temperature of the heating unit 30 and transmit the signal to the display panel (not shown), allowing the user to observe the temperature of the heating unit 30 and adjust the power of the heating element 32 and the speed of the cooling fan 12 in a timely manner. Adjusting the power of the heating unit 30 is for baking different types of food, and adjusting the speed of the cooling fan 12 is for reducing the surface temperature of the base 11. It is conceivable that the support plate 21 has an opening corresponding to the position of the temperature sensor 23, allowing it to be connected to the outside via a wire. Furthermore, an opening is also provided at the live and neutral wire ends of the heating unit 30 to ensure that the wires of the heating unit 30 can extend to the outside for power connection. The power control method of the display panel and the heating unit 30 are both existing technologies and will not be described in detail here.

[0029] One end face of the heating unit 30 is attached to the heat insulation layer 22, and the other side is used for assembling or placing the pot assembly 40. The heating unit 30 includes an integrally formed heat-conducting plate 31 and an electric heating tube 32 disposed in the heat-conducting plate 31. The heat-conducting plate 31 is an integral aluminum casting, and the electric heating tube 32 is die-cast together in the aluminum casting, and the electric heating tube 32 is distributed at the center of the heat-conducting plate 31.

[0030] The heat-conducting plate 31 includes a high-temperature zone 311 and a low-temperature zone 312 surrounding the high-temperature zone 311. The high-temperature zone 311 corresponds to the heating element 32; when the heating element 32 is connected to a power source, it generates heat, which is then conducted to the high-temperature zone 311. The heat-conducting plate 31 is integrally formed, making the high-temperature zone 311 and the low-temperature zone 312 integrated, so that the heat from the high-temperature zone 311 can be transferred to the low-temperature zone 312. The edge of the low-temperature zone 312 is inclined towards the supporting housing 112, which is more in line with the usage scenario. Please refer to... Figure 3Because the heating element 32 is installed in the high-temperature zone 311, and the thickness of the high-temperature zone 311 is greater than that of the low-temperature zone 312, the high-temperature zone 311 can accumulate more heat, thus increasing its temperature. Both the high-temperature zone 311 and the low-temperature zone 312 have flat end faces facing the pot assembly 40, ensuring sufficient heat conduction when in contact with the pot assembly 40. Furthermore, the low-temperature zone 312 is integrally formed with the high-temperature zone 311, allowing heat from the high-temperature zone 311 to be transferred to the low-temperature zone 312. In order to adjust or lower the temperature of the low-temperature zone 312, the thickness of the low-temperature zone 312 is less than the thickness of the high-temperature zone 311. This allows the low-temperature zone 312 to receive less heat from the high-temperature zone 311. Also, due to its smaller thickness, the heat dissipation rate is faster, resulting in less heat accumulating on the low-temperature zone 312 than on the high-temperature zone 311. Consequently, the temperature on the low-temperature zone 312 is lower than the temperature on the high-temperature zone 311, thus enabling the effect of different temperature zones to be achieved with a single heat source.

[0031] The heating element 32 is used to generate heat and conduct it to the pot assembly 40. The power of the heating element 32 can be adjusted by a controller (not shown) to regulate the temperature. In this embodiment, the temperature range of the high-temperature zone 311 is between 120°C and 260°C, and the temperature range of the low-temperature zone 312 is between 80°C and 120°C.

[0032] The pot assembly 40 includes a high-temperature pot 41 placed on the high-temperature zone 311 and a low-temperature pot 42 placed on the low-temperature zone 312.

[0033] The edge of the high-temperature pot 41 is bent outwards. The low-temperature pot 42 is annular, and its outer edge is bent and level with the bottom surface of the supporting shell 112. The outer diameter of the edge of the high-temperature pot 41 is larger than the inner diameter of the low-temperature pot 42, so that when the low-temperature pot 42 is lifted, the high-temperature pot 41 can be lifted together. When the low-temperature pot 42 is placed on the low-temperature zone 312, there is a gap between the edge of the low-temperature pot 42 and the edge of the supporting shell 112, so that the air blown into the supporting shell 112 by the cooling fan 12 can flow out through the gap, thereby reducing the temperature of the supporting shell 112 and preventing burns.

[0034] In use, place the multi-temperature zone electric oven on a table, ensuring the end face of the supporting outer shell 112 is suspended to allow for air circulation. Place the low-temperature pot 42 on the low-temperature zone 312, and then connect the heating element 32 to the power supply.

[0035] Compared with the prior art, the electric oven with multiple temperature zones provided by the present invention utilizes a cooling fan 12 installed in the bottom outer shell 111, a spaced-out arrangement between the support plate 21 and the supporting outer shell 112, and a spaced-out arrangement between the edge of the low-temperature pot 42 and the edge of the supporting outer shell 112. This allows air to be drawn into the bottom outer shell 111 by the cooling fan 12 and then flow out through the gaps, keeping the surface of the base 11 at a low temperature to prevent burns. The heating element 32 is installed in the heat-conducting plate 31, with the heating element 32 distributed at the center of the heat-conducting plate 31. The heat-conducting plate 31 includes a high-temperature zone 311 and a low-temperature zone 312 surrounding the high-temperature zone 311. The high-temperature zone 311 corresponds to the heating element 32, and the low-temperature zone 312 has a thinned wall to reduce heat conduction, thereby achieving a relatively low temperature effect at the periphery. This allows different temperature zones to be achieved using a single heat source.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions or improvements within the spirit of the present invention are covered within the scope of the claims of the present invention.

Claims

1. An electric oven with multiple temperature zones, characterized in that: The multi-temperature zone electric oven includes a base, a heat insulation layer disposed in the base, a heating unit disposed in the heat insulation layer, and a pot assembly disposed on the heating unit. The base includes a base plate, a cooling fan disposed in the base, a bottom outer shell, and a supporting outer shell disposed on the bottom outer shell. The bottom outer shell has an air inlet corresponding to the position of the cooling fan. The heat insulation layer includes a support plate fixedly disposed on the supporting outer shell, a heat insulation layer disposed on the support plate facing away from the cooling fan, and a... A temperature sensor is installed in the insulation layer. The support plate and the supporting shell are fixedly connected by fasteners, and a shim is provided between the support plate and the supporting shell. The heating unit includes an integrally formed heat-conducting plate and an electric heating tube installed in the heat-conducting plate. The heat-conducting plate includes a high-temperature zone and a low-temperature zone around the high-temperature zone. The pot assembly includes a high-temperature pot placed on the high-temperature zone and a low-temperature pot placed on the low-temperature zone. When the low-temperature pot is placed on the low-temperature zone, there is a gap between the edge of the low-temperature pot and the edge of the supporting shell.

2. The electric oven with multiple temperature zones as described in claim 1, characterized in that: The bottom outer shell and the supporting outer shell are integrally formed; the diameter of the bottom outer shell is larger than the diameter of the supporting outer shell.

3. The electric oven with multiple temperature zones as described in claim 1, characterized in that: An air exchange port is provided around the air inlet.

4. The electric oven with multiple temperature zones as described in claim 1, characterized in that: The shape of the heat insulation layer facing the end face of the heating unit matches the shape of the heating unit.

5. The electric oven with multiple temperature zones as described in claim 1, characterized in that: One end face of the heating unit is attached to the heat insulation layer, and the other side is used to assemble the pot assembly.

6. The electric oven with multiple temperature zones as described in claim 1, characterized in that: The edge of the low-temperature zone is inclined toward the supporting outer shell.

7. The electric oven with multiple temperature zones as described in claim 1, characterized in that: Both the high-temperature zone and the low-temperature zone have flat end faces facing the pot assembly.

8. The electric oven with multiple temperature zones as described in claim 1, characterized in that: The edge of the high-temperature pot is bent outward; the low-temperature pot is annular, and the outer edge of the low-temperature pot is bent and level with the bottom surface of the supporting shell.

9. The electric oven with multiple temperature zones as described in claim 1, characterized in that: The outer diameter of the high-temperature pot is larger than the inner diameter of the low-temperature pot.

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